Steve discusses how we can learn about the insides of stars by observing their surfaces, and how the Kepler Space telescope is the perfect instrument not only for finding extrasolar planets, but also studying oscillations on the surface of stars. We also talk about how the K2 mission is allowing us to do great science after the failure of a reaction wheel ended Kepler’s primary mission.

Edwin talks about his work modelling water geysers erupting from Saturn’s moon Enceladus, the best astrobiology experiment in the solar system, and just how much data we have on the surface features and atmosphere of Mars.